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Loans Held for Sale Narrative (Details) - USD ($) | 12 Months Ended
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Dec. 31, 2017 | Dec. 31, 2016 | Dec. 31, 2015
Loans Held for Sale [Line Items] |  |  |
Disposal Group, Including Discontinued Operation, Mortgage Loans | $ 4,148,000 | $ 10,413,000 |
Loans Held-for-sale, Mortgages, Contractual Balance | 4,100,000 | 10,300,000 |
Expected Gain (Loss) on Sale of Mortgage Loans | 55,000 | $ 131,000 |
Commercial Portfolio Segment [Member] |  |  |
Loans Held for Sale [Line Items] |  |  |
Loans held for sale - lower of cost or market | $ 0 |  | $ 100,000
Gain on sale of loans in secondary market |  |  | $ 800,000

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- Definition Expected Gain (Loss) on Sale of Mortgage Loans + References No definition available. + Details
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- Definition Loans Held-for-sale, Mortgages, Contractual Balance + References No definition available. + Details
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- Definition [Line Items] for Loans Held for Sale [Table] + References No definition available. + Details
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- Definition Loans held for sale - lower of cost or market + References No definition available. + Details
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- Definition The gains (losses) included in earnings that represent the difference between the sale price and the carrying value of loans and leases that were sold during the reporting period. This element refers to the gain (loss) and not to the cash proceeds of the sales. This element is a noncash adjustment to net income when calculating net cash generated by operating activities using the indirect method. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 230 -SubTopic 10 -Section 45 -Paragraph 24 -URI http://asc.fasb.org/extlink&oid=98514028&loc=d3e3521-108585 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 230 -SubTopic 10 -Section 45 -Paragraph 28 -Subparagraph (b) -URI http://asc.fasb.org/extlink&oid=98514028&loc=d3e3602-108585 + Details
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- Definition Amount, after allowance for bad debt, of mortgage loan receivables held-for-sale that are not part of a disposal group. Excludes loans and leases covered under loss sharing agreements and loans classified as debt securities. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 310 -SubTopic 10 -Section 45 -Paragraph 2 -URI http://asc.fasb.org/extlink&oid=82891408&loc=d3e4428-111522 + Details
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